DE3019837A1 - Neues verfahren zur reinigung der ursodesoxycholsaeure - Google Patents
Neues verfahren zur reinigung der ursodesoxycholsaeureInfo
- Publication number
- DE3019837A1 DE3019837A1 DE19803019837 DE3019837A DE3019837A1 DE 3019837 A1 DE3019837 A1 DE 3019837A1 DE 19803019837 DE19803019837 DE 19803019837 DE 3019837 A DE3019837 A DE 3019837A DE 3019837 A1 DE3019837 A1 DE 3019837A1
- Authority
- DE
- Germany
- Prior art keywords
- acid
- ursodeoxycholic acid
- ursodeoxycholic
- alkali metal
- metal salt
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- RUDATBOHQWOJDD-UZVSRGJWSA-N ursodeoxycholic acid Chemical compound C([C@H]1C[C@@H]2O)[C@H](O)CC[C@]1(C)[C@@H]1[C@@H]2[C@@H]2CC[C@H]([C@@H](CCC(O)=O)C)[C@@]2(C)CC1 RUDATBOHQWOJDD-UZVSRGJWSA-N 0.000 title claims description 45
- 229960001661 ursodiol Drugs 0.000 title claims description 44
- 238000000034 method Methods 0.000 title claims description 21
- RUDATBOHQWOJDD-UHFFFAOYSA-N (3beta,5beta,7alpha)-3,7-Dihydroxycholan-24-oic acid Natural products OC1CC2CC(O)CCC2(C)C2C1C1CCC(C(CCC(O)=O)C)C1(C)CC2 RUDATBOHQWOJDD-UHFFFAOYSA-N 0.000 claims description 52
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 24
- HEDRZPFGACZZDS-UHFFFAOYSA-N Chloroform Chemical compound ClC(Cl)Cl HEDRZPFGACZZDS-UHFFFAOYSA-N 0.000 claims description 20
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 claims description 19
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 13
- 229910052783 alkali metal Inorganic materials 0.000 claims description 12
- 239000002253 acid Substances 0.000 claims description 10
- -1 alkali metal salt Chemical class 0.000 claims description 10
- 229960001091 chenodeoxycholic acid Drugs 0.000 claims description 9
- RUDATBOHQWOJDD-BSWAIDMHSA-N chenodeoxycholic acid Chemical compound C([C@H]1C[C@H]2O)[C@H](O)CC[C@]1(C)[C@@H]1[C@@H]2[C@@H]2CC[C@H]([C@@H](CCC(O)=O)C)[C@@]2(C)CC1 RUDATBOHQWOJDD-BSWAIDMHSA-N 0.000 claims description 9
- 150000004702 methyl esters Chemical class 0.000 claims description 7
- 238000001953 recrystallisation Methods 0.000 claims description 5
- 238000004140 cleaning Methods 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 3
- 150000002148 esters Chemical class 0.000 claims description 3
- 229910003002 lithium salt Inorganic materials 0.000 claims description 3
- 159000000002 lithium salts Chemical class 0.000 claims description 3
- 239000007864 aqueous solution Substances 0.000 claims description 2
- 238000007127 saponification reaction Methods 0.000 claims description 2
- 159000000000 sodium salts Chemical class 0.000 claims description 2
- 230000032050 esterification Effects 0.000 claims 1
- 238000005886 esterification reaction Methods 0.000 claims 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 claims 1
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 description 21
- 238000003756 stirring Methods 0.000 description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 13
- 239000000203 mixture Substances 0.000 description 11
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 6
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 5
- 239000000243 solution Substances 0.000 description 5
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 4
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 4
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 239000003613 bile acid Substances 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 229910052744 lithium Inorganic materials 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- DKGAVHZHDRPRBM-UHFFFAOYSA-N Tert-Butanol Chemical compound CC(C)(C)O DKGAVHZHDRPRBM-UHFFFAOYSA-N 0.000 description 2
- 150000001340 alkali metals Chemical class 0.000 description 2
- 229910021529 ammonia Inorganic materials 0.000 description 2
- 210000000941 bile Anatomy 0.000 description 2
- HVYWMOMLDIMFJA-DPAQBDIFSA-N cholesterol Chemical compound C1C=C2C[C@@H](O)CC[C@]2(C)[C@@H]2[C@@H]1[C@@H]1CC[C@H]([C@H](C)CCCC(C)C)[C@@]1(C)CC2 HVYWMOMLDIMFJA-DPAQBDIFSA-N 0.000 description 2
- 239000012141 concentrate Substances 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000004090 dissolution Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000003960 organic solvent Substances 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 238000010992 reflux Methods 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 238000003786 synthesis reaction Methods 0.000 description 2
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- BHQCQFFYRZLCQQ-UHFFFAOYSA-N (3alpha,5alpha,7alpha,12alpha)-3,7,12-trihydroxy-cholan-24-oic acid Natural products OC1CC2CC(O)CCC2(C)C2C1C1CCC(C(CCC(O)=O)C)C1(C)C(O)C2 BHQCQFFYRZLCQQ-UHFFFAOYSA-N 0.000 description 1
- DXOCDBGWDZAYRQ-DVTFWNRPSA-N (4r)-4-[(3r,8r,9s,10s,13r,14s,17r)-3-hydroxy-10,13-dimethyl-7-oxo-1,2,3,4,5,6,8,9,11,12,14,15,16,17-tetradecahydrocyclopenta[a]phenanthren-17-yl]pentanoic acid Chemical compound C1C[C@@H](O)CC2CC(=O)[C@H]3[C@@H]4CC[C@H]([C@@H](CCC(O)=O)C)[C@@]4(C)CC[C@@H]3[C@]21C DXOCDBGWDZAYRQ-DVTFWNRPSA-N 0.000 description 1
- NEEIOMGUTSQVRZ-RDIILWCNSA-N (4r)-4-[(5s,8r,9s,10s,13r,14s,17r)-10,13-dimethyl-2,3,4,5,6,7,8,9,11,12,14,15,16,17-tetradecahydro-1h-cyclopenta[a]phenanthren-17-yl]-2,2-dihydroxypentanoic acid Chemical compound C([C@H]1CC2)CCC[C@]1(C)[C@@H]1[C@@H]2[C@@H]2CC[C@H]([C@@H](CC(O)(O)C(O)=O)C)[C@@]2(C)CC1 NEEIOMGUTSQVRZ-RDIILWCNSA-N 0.000 description 1
- 239000004380 Cholic acid Substances 0.000 description 1
- 229920000742 Cotton Polymers 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 1
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 1
- UIIMBOGNXHQVGW-DEQYMQKBSA-M Sodium bicarbonate-14C Chemical compound [Na+].O[14C]([O-])=O UIIMBOGNXHQVGW-DEQYMQKBSA-M 0.000 description 1
- GRQROVWZGGDYSW-ZQMFMVRBSA-N Ursodeoxycholic Acid Methyl Ester Chemical compound C([C@H]1C[C@@H]2O)[C@H](O)CC[C@]1(C)[C@@H]1[C@@H]2[C@@H]2CC[C@H]([C@H](C)CCC(=O)OC)[C@@]2(C)CC1 GRQROVWZGGDYSW-ZQMFMVRBSA-N 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 239000008346 aqueous phase Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 201000001883 cholelithiasis Diseases 0.000 description 1
- 235000012000 cholesterol Nutrition 0.000 description 1
- 229960002471 cholic acid Drugs 0.000 description 1
- BHQCQFFYRZLCQQ-OELDTZBJSA-N cholic acid Chemical compound C([C@H]1C[C@H]2O)[C@H](O)CC[C@]1(C)[C@@H]1[C@@H]2[C@@H]2CC[C@H]([C@@H](CCC(O)=O)C)[C@@]2(C)[C@@H](O)C1 BHQCQFFYRZLCQQ-OELDTZBJSA-N 0.000 description 1
- 235000019416 cholic acid Nutrition 0.000 description 1
- KXGVEGMKQFWNSR-UHFFFAOYSA-N deoxycholic acid Natural products C1CC2CC(O)CCC2(C)C2C1C1CCC(C(CCC(O)=O)C)C1(C)C(O)C2 KXGVEGMKQFWNSR-UHFFFAOYSA-N 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 208000001130 gallstones Diseases 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- IXCSERBJSXMMFS-UHFFFAOYSA-N hydrogen chloride Substances Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 description 1
- 229910000041 hydrogen chloride Inorganic materials 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- MYWUZJCMWCOHBA-VIFPVBQESA-N methamphetamine Chemical compound CN[C@@H](C)CC1=CC=CC=C1 MYWUZJCMWCOHBA-VIFPVBQESA-N 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 235000010755 mineral Nutrition 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- BSYVTEYKTMYBMK-UHFFFAOYSA-N tetrahydrofurfuryl alcohol Chemical compound OCC1CCCO1 BSYVTEYKTMYBMK-UHFFFAOYSA-N 0.000 description 1
- 238000004809 thin layer chromatography Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07J—STEROIDS
- C07J9/00—Normal steroids containing carbon, hydrogen, halogen or oxygen substituted in position 17 beta by a chain of more than two carbon atoms, e.g. cholane, cholestane, coprostane
- C07J9/005—Normal steroids containing carbon, hydrogen, halogen or oxygen substituted in position 17 beta by a chain of more than two carbon atoms, e.g. cholane, cholestane, coprostane containing a carboxylic function directly attached or attached by a chain containing only carbon atoms to the cyclopenta[a]hydrophenanthrene skeleton
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Steroid Compounds (AREA)
- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR7913117A FR2457302A1 (fr) | 1979-05-23 | 1979-05-23 | Nouveau procede de purification de l'acide ursodesoxycholique |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| DE3019837A1 true DE3019837A1 (de) | 1980-11-27 |
| DE3019837C2 DE3019837C2 (enrdf_load_stackoverflow) | 1991-05-16 |
Family
ID=9225771
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19803019837 Granted DE3019837A1 (de) | 1979-05-23 | 1980-05-23 | Neues verfahren zur reinigung der ursodesoxycholsaeure |
Country Status (18)
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2444048B1 (enrdf_load_stackoverflow) | 1978-12-15 | 1981-08-14 | Roussel Uclaf | |
| IT1132055B (it) * | 1980-05-14 | 1986-06-25 | Erregierre Spa | Processo per la preparazione di acido ursodesossicolico ad alta purezza |
| IT1167478B (it) * | 1981-07-24 | 1987-05-13 | Carlo Scolastico | Derivati dell'acido ursodesossicolico |
| IT1150756B (it) * | 1982-04-02 | 1986-12-17 | Zambon Spa | Procedimento per preparare l'acido 3alfa, 7beta-diidrossi-5beta-colanico |
| DE3930696A1 (de) * | 1989-09-14 | 1991-03-28 | Hoechst Ag | Gallensaeurederivate, verfahren zu ihrer herstellung, verwendung als arzneimittel |
| IL157816A0 (en) | 2001-03-12 | 2004-03-28 | Roberto Pellicciari | Steroids as agonists for fxr |
| CN114349810A (zh) * | 2021-12-30 | 2022-04-15 | 北京岳达生物科技有限公司 | 甾类化合物通用的手性拆分方法 |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2404102B1 (de) * | 1974-01-25 | 1975-03-27 | Schering Ag, 1000 Berlin Und 4619 Bergkamen | Verfahren zur Reinigung roher Chenodesoxycholsäure |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52153954A (en) * | 1976-06-18 | 1977-12-21 | Tokyo Tanabe Co | Purification method of ulsodeoxycholic acid |
-
1979
- 1979-05-23 FR FR7913117A patent/FR2457302A1/fr active Granted
-
1980
- 1980-01-31 SE SE8000776A patent/SE442119B/sv not_active IP Right Cessation
- 1980-03-01 ES ES489114A patent/ES489114A1/es not_active Expired
- 1980-03-21 ZA ZA00801664A patent/ZA801664B/xx unknown
- 1980-04-02 FI FI801054A patent/FI67388C/fi not_active IP Right Cessation
- 1980-04-17 JP JP4963380A patent/JPS55154999A/ja active Granted
- 1980-04-30 DK DK186780A patent/DK145760C/da not_active IP Right Cessation
- 1980-05-05 US US06/146,496 patent/US4282161A/en not_active Expired - Lifetime
- 1980-05-20 PT PT71271A patent/PT71271B/pt unknown
- 1980-05-22 CH CH401980A patent/CH646181A5/fr not_active IP Right Cessation
- 1980-05-22 AU AU58682/80A patent/AU529723B2/en not_active Ceased
- 1980-05-22 BE BE0/200722A patent/BE883434A/fr not_active IP Right Cessation
- 1980-05-22 HU HU801293A patent/HU182687B/hu not_active IP Right Cessation
- 1980-05-22 CA CA000352535A patent/CA1134815A/fr not_active Expired
- 1980-05-22 IT IT48762/80A patent/IT1188938B/it active
- 1980-05-23 DE DE19803019837 patent/DE3019837A1/de active Granted
- 1980-05-23 GB GB8017124A patent/GB2052507B/en not_active Expired
- 1980-05-23 NL NL8003000A patent/NL8003000A/nl not_active Application Discontinuation
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2404102B1 (de) * | 1974-01-25 | 1975-03-27 | Schering Ag, 1000 Berlin Und 4619 Bergkamen | Verfahren zur Reinigung roher Chenodesoxycholsäure |
Non-Patent Citations (2)
| Title |
|---|
| C.A. 87, 168 277 r, 1977 * |
| C.A. 88, 152 862 n, 1978 * |
Also Published As
| Publication number | Publication date |
|---|---|
| SE442119B (sv) | 1985-12-02 |
| FI67388C (fi) | 1985-03-11 |
| IT8048762A1 (it) | 1981-11-22 |
| JPS6351156B2 (enrdf_load_stackoverflow) | 1988-10-13 |
| US4282161A (en) | 1981-08-04 |
| FR2457302B1 (enrdf_load_stackoverflow) | 1982-10-15 |
| CA1134815A (fr) | 1982-11-02 |
| AU5868280A (en) | 1980-11-27 |
| IT8048762A0 (it) | 1980-05-22 |
| ES489114A1 (es) | 1980-08-16 |
| PT71271A (fr) | 1980-05-31 |
| FI67388B (fi) | 1984-11-30 |
| FI801054A7 (fi) | 1980-11-24 |
| AU529723B2 (en) | 1983-06-16 |
| DK145760B (da) | 1983-02-21 |
| ZA801664B (en) | 1981-03-25 |
| HU182687B (en) | 1984-02-28 |
| FR2457302A1 (fr) | 1980-12-19 |
| GB2052507A (en) | 1981-01-28 |
| DK186780A (da) | 1980-11-24 |
| JPS55154999A (en) | 1980-12-02 |
| BE883434A (fr) | 1980-11-24 |
| GB2052507B (en) | 1983-08-10 |
| DE3019837C2 (enrdf_load_stackoverflow) | 1991-05-16 |
| CH646181A5 (fr) | 1984-11-15 |
| DK145760C (da) | 1983-08-15 |
| NL8003000A (nl) | 1980-11-25 |
| IT1188938B (it) | 1988-01-28 |
| SE8000776L (sv) | 1980-11-24 |
| PT71271B (en) | 1982-10-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| DE3019837C2 (enrdf_load_stackoverflow) | ||
| DE1810033A1 (de) | Verfahren zur Herstellung von Desoxycholsaeure | |
| DE673485C (de) | Verfahren zur Darstellung von 1-Ascorbinsaeure | |
| CH276556A (de) | Verfahren zur Herstellung von Pentaenen. | |
| DE1803911C3 (de) | Verfahren zur Herstellung von 7-Chlor-2-methylamino-5-phenyl-3H-l,4benzodiazepin-4-oxid | |
| DE850751C (de) | Verfahren zur Herstellung von Furan-2,5-dicarbonsaeureestern | |
| DE931947C (de) | Verfahren zur Herstellung von 20, 21-Pregnanketolestern | |
| AT233176B (de) | Verfahren zur Herstellung neuer 21-Halbester von im Ring A ungesättigten 3, 20-Dioxo-21-hydroxypregnanverbindungen | |
| DE1044820B (de) | Verfahren zur Herstellung von Reserpoxidinsaeuremonoestern mit freier Hydroxylgruppeund ihren Salzen | |
| DE896805C (de) | Verfahren zur Herstellung eines Testosteronesters | |
| AT212304B (de) | Verfahren zur Herstellung von Aminosäureestern von threo-1-(p-Nitrophenyl)-2-dichloracetamidopropan-1, 3-diolen | |
| DE1939164A1 (de) | 14beta-Hydroxy-15alpha-acyloxy-cardenolide | |
| AT220765B (de) | Verfahren zur Herstellung von 4-Methyl-17α-hydroxyprogesteron und dessen Estern | |
| AT155799B (de) | Verfahren zur Darstellung von l-Ascorbinsäure. | |
| CH398541A (de) | Verfahren zur Reinigung von aromatischen Carbonsäuren | |
| CH346214A (de) | Verfahren zur Herstellung von Hydro-retrocortin und seinen 21-Estern | |
| CH348159A (de) | Verfahren zur Herstellung von neuen Nikotinsäureestern | |
| DE1136703B (de) | Verfahren zur Herstellung von choleretisch wirksamen Phenyl-aethylcarbinol-carbonsaeureestern | |
| CH293297A (de) | Verfahren zur Herstellung eines neuen Esters. | |
| DE2014874A1 (de) | Verfahren zur Spaltung von Ammonium-N-acetyl-DL-alpha-aminophenylacetat | |
| CH273602A (de) | Verfahren zur Herstellung von | |
| CH347533A (de) | Verfahren zur Herstellung des Phenylesters der 2-Hydroxy-4-amino-benzoesäure | |
| CH493454A (de) | Verfahren zur Herstellung des 1,2,3,4-Tetrahydrotetraoxonaphthalindihydrats | |
| CH420143A (de) | Verfahren zur Herstellung von Pregnan-3B,5a,6B,16B,20a-pentol und dessen Estern | |
| DE1154466B (de) | Verfahren zur Herstellung von 7-Dehydrocholesterinestern bzw. 7-Dehydrocholesterin |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 8128 | New person/name/address of the agent |
Representative=s name: ASSMANN, E., DIPL.-CHEM. DR.RER.NAT. KLINGSEISEN, |
|
| 8110 | Request for examination paragraph 44 | ||
| D2 | Grant after examination | ||
| 8364 | No opposition during term of opposition | ||
| 8339 | Ceased/non-payment of the annual fee |